I had this problem for a while on one of my programs, however it was only when I was Desk Top Connected onto another computer running the program remotely. I looked into this error a little more and found that if I tried running the program when the computer was running a resolution that isn't the maximum size for the monitor the active x controls would change size when used, When I changed the resolution to match the monitor default, it fixed itself. I don't know if this is the same problem you are having, but I thought I would try and help out.